Throttling buffering oil cylinder
By setting a throttling buffer structure in the hydraulic cylinder and spraying a molybdenum disulfide PTFE coating on the piston surface, the problems of high hydraulic cylinder buffering debugging cost and low-speed vibration are solved, achieving efficient buffering effect and stable low-speed operation.
Patent Information
- Application Number
- CN202520024459.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-06
AI Technical Summary
The existing hydraulic cylinders have high buffering and debugging costs and long cycles. They are prone to crawling and shaking when running at low speeds, and the guide rings are easily scratched.
The system adopts a throttling buffer cylinder structure. By setting first and second oil passage blocks on the cylinder body, the buffering effect is adjusted by using a throttling screw, and a PTFE coating containing molybdenum disulfide is sprayed on the piston surface to reduce friction.
This allows for adjusting the buffer effect without disassembling the inside of the hydraulic cylinder, saving costs and time, reducing vibrations during low-speed operation, and preventing the guide ring from being scratched.
Smart Images
Figure CN223608987U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of oil cylinder especially a throttling buffer oil cylinder. BACKGROUND
[0002] The bottom impact and low-speed running jitter of oil cylinder are common problems of oil cylinder. The bottom impact of oil cylinder is generally solved by increasing buffer, and the existing front buffer mostly adopts Figure 1 structure. When the oil cylinder is extended, the front buffer sleeve enters the inside of the guide sleeve, the extension speed of the oil cylinder is reduced through flow interception, and front buffer is realized. Since the calculation of buffer gap has no complete theoretical basis so far, the existing buffer needs to be debugged, Figure 1 structure. Since the oil cylinder needs to be disassembled and the buffer sleeve needs to be reprocessed, the cost is very high, and the cycle is also very long. To solve the problem of low-speed running crawling jitter of oil cylinder, a specially-made low-friction sealing ring and improved cylinder processing accuracy are generally required, but this method requires high processing capacity and increases manufacturing cost. To solve the above two problems, a new buffer structure and piston structure are developed to solve the problems of high cost and long cycle of front buffer debugging and low-speed running crawling jitter of oil cylinder. SUMMARY
[0003] The utility model aims at least solves one of the technical problems existing in the prior art.
[0004] Therefore, the utility model provides a throttling buffer oil cylinder, which can greatly reduce the buffer debugging time under the premise of ensuring the front buffer performance of the oil cylinder, save the cost, reduce the development cycle of the oil cylinder, and ensure the low-speed running of the oil cylinder.
[0005] The throttling buffer oil cylinder according to the utility model embodiment comprises a piston, a cylinder body, a piston rod and a guide sleeve, the piston is arranged at one end of the piston rod, the guide sleeve is arranged at one end of the cylinder body, the piston divides the internal space of the cylinder body into a rodless cavity and a rod cavity, and the cylinder body is provided with a first oil passage block and a second oil passage block, the first oil passage block is provided with a rodless cavity oil port and a rod cavity oil port, the rodless cavity oil port is communicated with the rodless cavity through a first oil pipe, the rod cavity oil port is communicated with the rod cavity through a second oil pipe, the second oil passage block is provided with a one-way valve communicated with the second oil pipe, and at least two throttling screws are installed at the oil return port communicated with the rod cavity.
[0006] According to one embodiment of the utility model, the surface of the piston is sprayed with a PTFE coating containing molybdenum disulfide.
[0007] According to one embodiment of the utility model, the oil return port is arranged on the cylinder body in the second oil passage block, the throttling screws are detachably installed at the oil return port, and the throttling screws are axially spaced.
[0008] According to one embodiment of the utility model, the outer wall of the throttle screw is provided with external threads, the cylinder at the oil return port is provided with internal threads, and the throttle screw is detachably installed at the oil return port through cooperation of the external threads and the internal threads.
[0009] According to one embodiment of the utility model, the throttle screw (6) has throttle holes with different sizes.
[0010] According to one embodiment of the utility model, a cross-shaped oil path is arranged in the second oil path block, the cross-shaped oil path comprises a first oil path, a second oil path, a third oil path and a fourth oil path, the first oil path and the second oil path are distributed left and right, the third oil path and the fourth oil path are distributed up and down, the second oil path is located to the right of the first oil path, and the fourth oil path is located above the third oil path.
[0011] According to one embodiment of the utility model, the first oil path is connected with a second oil pipe, the second oil path is provided with the one-way valve, the third oil path is the oil return port, and the fourth oil path is provided with a detachable plug.
[0012] According to one embodiment of the utility model, a cover plate is arranged on the second oil path block to prevent the plug from being detached from the fourth oil path.
[0013] According to one embodiment of the utility model, the first oil path block and the second oil path block are both welded and fixed on the cylinder.
[0014] The utility model has the advantages that the buffer effect can be adjusted without disassembling the oil cylinder, cost and adjustment period are greatly saved, the throttle screw with a throttle hole of different sizes can be replaced to adjust the buffer effect, more throttle screws are covered as the piston rod is extended, the throttling effect is better, the pressure in the rod cavity is higher, and the buffer effect is better, the piston cancels the guide ring used in the conventional oil cylinder, copper is first stacked on the surface of the piston, then a PTFE coating containing molybdenum disulfide is sprayed, and the piston with the PTFE coating containing molybdenum disulfide has lower friction, and is not prone to shaking during low-speed operation.
[0015] To make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0017] Figure 1 is a structural schematic diagram of a traditional throttling buffer oil cylinder;
[0018] Figure 2 is a structural schematic diagram of a throttling buffer oil cylinder of the present application Figure 1 ;
[0019] Figure 3 is a structural schematic diagram of a throttling buffer oil cylinder of the present application Figure 2 ;
[0020] Figure 4 is Figure 3 a local enlarged view of A in FIG.
[0021] The reference numerals in the figure are: 1, piston; 2, cylinder body; 3, piston rod; 4, guide sleeve; 5, one-way valve; 6, throttling screw; 7, first oil passage block; 8, second oil passage block; 9, rodless cavity oil port; 10, rod cavity oil port; 21, rodless cavity; 22, rod cavity; 23, oil inlet; 24, first oil pipe; 25, oil return port; 26, second oil pipe; 11, plug; 12, cover plate. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0023] In the description of the present application, it should be understood that the terms "one side", "the other side", "both sides", "between", "middle", "upper end", "lower end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.
[0024] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "arrange", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be direct connection, also can pass through intermediate medium indirectly connect. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.
[0025] The throttling buffer oil cylinder of the utility model embodiment is specifically described below with reference to the drawings.
[0026] See Figure 2 , Figure 3 And Figure 4 The throttling buffer oil cylinder of the utility model, including piston 1, cylinder body 2, piston rod 3 and guide sleeve 4, piston 1 is arranged at one end of piston rod 3, guide sleeve 4 is arranged at one end of cylinder body 2, piston 1 divides the internal space of cylinder body 2 into rodless cavity 21 and rod cavity 22, first oil passage block 7 and second oil passage block 8 are arranged on cylinder body 2, and first oil passage block 7 and second oil passage block 8 are both welded and fixed on cylinder body 2. Rodless cavity oil port 9 and rod cavity oil port 10 are arranged on first oil passage block 7, rodless cavity oil port 9 is communicated with rodless cavity 21 through first oil pipe 24, and rod cavity oil port 10 is communicated with rod cavity 22 through second oil pipe 25, and one-way valve 5 communicated with second oil pipe 25 is arranged on second oil passage block 8;At least two throttling screws 6 are installed at the oil return port communicated with rod cavity 22.
[0027] Preferably, the surface of the piston 1 is sprayed with a PTFE coating containing molybdenum disulfide.
[0028] Preferably, the oil return port is arranged on the cylinder body 2 in the second oil passage block 8, and three throttling screws 6 are detachably installed at the oil return port, and the three throttling screws 6 are axially spaced apart. More specifically, the outer wall of the throttling screw 6 is provided with external threads, and the cylinder body 2 at the oil return port is provided with internal threads, and the throttling screw 6 is detachably installed at the oil return port by cooperation of the external threads and the internal threads.
[0029] Preferably, the throttling screw 6 has throttling holes of different sizes.
[0030] A cross-shaped oil passage is arranged in the second oil passage block 8, the cross-shaped oil passage includes a first oil passage, a second oil passage, a third oil passage and a fourth oil passage, the first oil passage and the second oil passage are distributed left and right, the third oil passage and the fourth oil passage are distributed up and down, the second oil passage is located on the right side of the first oil passage, and the fourth oil passage is located above the third oil passage. The first oil passage is connected with the second oil pipe 25, the second oil passage is provided with a one-way valve 5, the third oil passage is an oil return port, and a detachable plug 11 is arranged in the fourth oil passage. A cover plate 12 is arranged on the second oil passage block 8 to prevent the plug 11 from being detached from the fourth oil passage.
[0031] SeeFigure 2 After the oil cylinder is assembled, the oil inlet and return of the rodless cavity oil port 9 and the rod cavity oil port 10 are controlled through the oil way block welded on the cylinder body 2, and then the extension and retraction of the oil cylinder are controlled.
[0032] See Figure 3 and Figure 4 When the oil cylinder is extended to the position shown in the figure, the piston 1 blocks the oil return port of the oil cylinder, the second oil way (the rightmost oil return port) is closed by the one-way valve 5, and the hydraulic oil can only return through the throttle hole in the throttle screw 6, which will cause the pressure of the rod cavity 22 to increase to give the oil cylinder a leftward force, and then slow down the extension of the oil cylinder, so as to achieve the purpose of buffering. As the piston rod 3 continuously extends, more and more throttle screws 6 are covered, the number of throttle holes is continuously reduced, and then the pressure of the rod cavity 22 is continuously increased, the running speed of the oil cylinder is continuously reduced, the buffering effect is continuously enhanced, and the oil cylinder is completely extended. When the piston 1 completely passes through the three throttle screws 6, the buffering effect of the oil cylinder reaches the strongest, and the oil cylinder will extend at the slowest speed. When the oil cylinder needs to be retracted after being completely extended, the rod cavity 22 is pressurized, at which time the one-way valve 5 is opened, and the hydraulic oil enters the oil cylinder from the second oil way (the rightmost oil return port), thereby solving the problem that the oil cylinder cannot be retracted after being completely extended. In an embodiment according to the utility model, the throttle screw 6 can be removed. More specifically, the cover plate 12 above the oil cylinder is opened, the plug 11 is disassembled, and then the throttle screw 6 is taken out, and then the throttle screw 6 with different aperture throttle holes can be replaced, so that the front buffering can be debugged without disassembling the inside of the oil cylinder. By replacing the throttle screw 6 with different aperture throttle holes, different buffering effects can be achieved. The piston 1 of the throttling and buffering oil cylinder of the utility model cancels the guide ring used in the conventional oil cylinder, but first piles copper on the surface of the piston 1, and then sprays a PTFE coating containing molybdenum disulfide, the piston 1 sprayed with the PTFE coating containing molybdenum disulfide has lower friction, and is not prone to shaking during low-speed operation. In addition, the piston 1 sprayed with the PTFE coating containing molybdenum disulfide can also solve the problem that the guide ring is damaged when passing through the hole.
[0033] The working principle of the throttling and buffering oil cylinder is that the oil inlet 23 of the rodless cavity 21 is pressurized, and the piston rod 3 extends, and when the piston 1 extends to Figure 3 and Figure 4 the position, the piston 1 blocks the oil return port of the rod cavity 22, and the hydraulic oil can only return to the oil return port of the rod cavity 22 through the small holes in the throttle screw 6 and the gap between the piston 1 and the cylinder barrel, the pressure of the rod cavity 22 is increased, and the movement speed of the piston rod 3 is reduced, thereby achieving the purpose of buffering.
[0034] Compared with the traditional structure, the throttling buffer oil cylinder has better buffering effect, can debug the buffering effect without disassembling the inside of the oil cylinder, greatly saves the cost and debugging period, can adjust the buffering effect by replacing the throttling screw 6 with different aperture, with the piston rod 3 extending, the more throttling screws 6 covered, the better the throttling effect, the higher the pressure of the rod cavity 22, the better the buffering effect, that is, with the piston rod 3 extending, the buffering effect is continuously enhanced, and the running speed of the oil cylinder is slower and slower; compared with general oil cylinders, can not shake at low speed, has higher performance, and solves the problem that the guide ring is scraped when passing through the hole, the piston 1 cancels the guide ring used in the conventional oil cylinder, but first piles copper on the surface of the piston 1, then sprays the PTFE coating containing molybdenum disulfide, the piston 1 sprayed with the PTFE coating containing molybdenum disulfide has lower friction, and is not prone to shaking at low speed.
[0035] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A throttling buffer cylinder, comprising a piston (1), a cylinder body (2), a piston rod (3), and a guide sleeve (4), wherein the piston (1) is disposed at one end of the piston rod (3), and the guide sleeve (4) is disposed at one end of the cylinder body (2), wherein the piston (1) divides the internal space of the cylinder body (2) into a rodless chamber (21) and a rod chamber (22), characterized in that: The cylinder block (2) is provided with a first oil passage block (7) and a second oil passage block (8). The first oil passage block (7) is provided with a rodless chamber oil port (9) and a rod chamber oil port (10). The rodless chamber oil port (9) is connected to the rodless chamber (21) through a first oil pipe (24). The rod chamber oil port (10) is connected to the rod chamber (22) through a second oil pipe (25). The second oil passage block (8) is provided with a one-way valve (5) connected to the second oil pipe (25). At least two throttle screws (6) are installed at the oil return port connected to the rod chamber (22).
2. The throttling buffer cylinder according to claim 1, characterized in that: The surface of the piston (1) is coated with a PTFE coating containing molybdenum disulfide.
3. The throttling buffer cylinder according to claim 1, characterized in that: The oil return port is located on the cylinder (2) within the second oil passage block (8), and the throttle screw (6) is detachably installed at the oil return port. The throttle screws (6) are axially spaced.
4. The throttling buffer cylinder according to claim 3, characterized in that: The outer wall of the throttle screw (6) is provided with an external thread, and the cylinder body (2) at the oil return port is provided with an internal thread. The throttle screw (6) is detachably installed at the oil return port through the cooperation of the external thread and the internal thread.
5. The throttling buffer cylinder according to claim 4, characterized in that: The throttling screw (6) has throttling orifices with different diameters.
6. The throttling buffer cylinder according to claim 1, characterized in that: The second oil circuit block (8) is provided with a cross-shaped oil circuit, which includes a first oil circuit, a second oil circuit, a third oil circuit and a fourth oil circuit. The first oil circuit and the second oil circuit are distributed left and right, and the third oil circuit and the fourth oil circuit are distributed up and down. The second oil circuit is located to the right of the first oil circuit, and the fourth oil circuit is located above the third oil circuit.
7. The throttling buffer cylinder according to claim 6, characterized in that: The first oil circuit is connected to the second oil pipe (25), the second oil circuit is equipped with the one-way valve (5), the third oil circuit is connected to the return port, and the fourth oil circuit is equipped with a removable plug (11).
8. The throttling buffer cylinder according to claim 7, characterized in that: The second oil circuit block (8) is provided with a cover plate (12) to prevent the plug (11) from coming off from the fourth oil circuit.
9. The throttling buffer cylinder according to claim 1, characterized in that: The first oil passage block (7) and the second oil passage block (8) are both welded and fixed to the cylinder body (2).